Re: AW: SQL null indicators when not all columns are null capable

Well, lets take a survey on the web - a question where you have 3
choises in a combobox:

- Not answered (returns a "-")
- yes (returns a "0")
- no (returns a "1")

you have to do some kind of special code to convert the combobox
values into a *null - back and forth - so what is it worth ?

/Henrik



"John Arnold (MFS)" <jarnold@xxxxxxxxxxxxxxxxxxxxxxxxxx>
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14-04-2010 20:29
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RPG programming on the IBM i / System i <rpg400-l@xxxxxxxxxxxx>


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RE: AW: SQL null indicators when not all columns are null capable






In our application, a null value identifies a survey question that was not
answered. We do not want to default to true or false when no answer was
given.

-----Original Message-----
From: rpg400-l-bounces@xxxxxxxxxxxx [mailto:rpg400-l-bounces@xxxxxxxxxxxx]
On Behalf Of hr@xxxxxxxxxxxx
Sent: Wednesday, April 14, 2010 2:32 PM
To: RPG programming on the IBM i / System i
Subject: Re: AW: SQL null indicators when not all columns are null capable

Just following this discussion from the sideline, can anybody give me a
reason to use a *NULL capable field in a commercial database ?

It seems to me that it only makes trouble !

/henrik




"Birgitta Hauser" <Hauser@xxxxxxxxxxxxxxx>
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14-04-2010 19:33
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RPG programming on the IBM i / System i <rpg400-l@xxxxxxxxxxxx>


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AW: SQL null indicators when not all columns are null capable






Alan means, instead of specifying an array in the IND_ARRAY data structure
you should specify each indicator.
D IND_ARRAY D Occurs(10)
D IND01 5I 0
D IND02 5I 0
...

Good luck! The last time I tried it, it didn't work either.
(But perhaps meanwhile a PTF was sent out).

Mit freundlichen Grüßen / Best regards

Birgitta Hauser

"Shoot for the moon, even if you miss, you'll land among the stars." (Les
Brown)
"If you think education is expensive, try ignorance." (Derek Bok)
"What is worse than training your staff and losing them? Not training them
and keeping them!"


-----Ursprüngliche Nachricht-----
Von: rpg400-l-bounces@xxxxxxxxxxxx [mailto:rpg400-l-bounces@xxxxxxxxxxxx]
Im
Auftrag von Rick.Chevalier@xxxxxxxxxxxxxxx
Gesendet: Wednesday, 14. April 2010 19:11
An: rpg400-l@xxxxxxxxxxxx
Betreff: RE: SQL null indicators when not all columns are null capable

Alan,

Would you be more specific please? Can't do what? The code was based on
an
example right out of the SQL Programming link on the V5R4 InfoCenter site.
Specifically, Database-> Programming->Embedded SQL programming->Coding SQL
statements in ILE RPG applications->Using host structure arrays in ILE RPG
applications that use SQL.

From the web site:

The following example uses a host structure array called DEPARTMENT and a
blocked FETCH statement to retrieve 10 rows from the DEPARTMENT table.

DDEPARTMENT DS OCCURS(10)
D DEPTNO 01 03A
D DEPTNM 04 32A
D MGRNO 33 38A
D ADMRD 39 41A

DIND_ARRAY DS OCCURS(10)
D INDS 4B 0 DIM(4)
...
C/EXEC SQL
C+ DECLARE C1 CURSOR FOR
C+ SELECT *
C+ FROM CORPDATA.DEPARTMENT
C/END-EXEC
...

C/EXEC SQL
C+ FETCH C1 FOR 10 ROWS
C+ INTO :DEPARTMENT:IND_ARRAY
C/END-EXEC

Rick

-----Original Message-----
From: rpg400-l-bounces@xxxxxxxxxxxx [mailto:rpg400-l-bounces@xxxxxxxxxxxx]
On Behalf Of Alan Campin
Sent: Wednesday, April 14, 2010 11:28 AM
To: RPG programming on the IBM i / System i
Subject: Re: SQL null indicators when not all columns are null capable

The manual specifically states you cannot do this. I talked with IBM and
they pointed this out. What you have in effect is a two-dimensional array
which SQL does not support.


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